JP2013099470A - Lining fabric for chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide lining fabric for chairs, wherein there is provided a chair having light weight, relief from sweatiness, sitting comfort for a long time as well as that for a short time.SOLUTION: The lining fabric for chair has a basis weight of 200-1,200 g/m, a thickness of 0.3-3 mm, and an amount of elastic yarn used in fabric of 30-80 wt.%. The fabric is used so that there are provided areas F1, F2 having 5-50% area of a seating face part area E and having a large stretchability and so that a E/P value is set in the range of 0.4-0.97 wherein the E/P value is obtained by dividing the maximum pressure value E (g/cm) of the fabric by the maximum pressure value P (g/cm) in the same seating face position of the fabric with the same knitted fabric and with no area having a large stretchability.

Description

  The present invention relates to a fabric for upholstery, and more particularly to a fabric for upholstery that is less likely to get tired even if used for a long time.

  In recent years, the design of office chairs, in particular, has been designed, of course, but it has been reported that it is lightweight and has a good sitting comfort, such as not getting stuffy or tired even after prolonged use. Therefore, the pipe chair that has been used conventionally, that is, an inexpensive pipe chair in which a thin foamed urethane layer is pasted on a flat plate with a hard seat surface on which the buttocks are placed, and further covered with a flat thin film, is thick. It has been changed to a stuffed cotton-type chair with a seat surface part that is soft and stuffed with cushioning material such as urethane foam and padding, and has a dent of the buttocks curved surface.

  However, such stuffed cotton chairs are not lightweight because they use stuffing, and there is a drawback that they are easily stuffy due to the stuffing, especially in the summer, and the seat surface has a dent on the buttocks curved surface. In spite of this, since there is a feeling of bottoming when used for a long time, the buttock is pressed, and the numbness generated in the conventional pipe chair cannot be resolved.

  In order to eliminate the above-mentioned drawbacks and the like, a chair using an elastic mesh fabric containing elastic yarn has been developed.

  However, the chair made of elastic mesh fabric solved the problem of weight reduction and rid of stuffiness, but the feeling of bottoming has not been eliminated, and the buttocks are gradually compressed when sitting for a long time. As a result, it has not been solved yet to feel mild numbness in the buttocks. The cause of this mild numbness is that the elastic yarn remains in a slightly stretched state due to the weight load when seated despite the use of a stretchable fabric. The elastic fabric is generally in a tensioned state, and the pressure distribution to the heel portion due to the tension state of the stretchable fabric is uniform regardless of the concavo-convex shape of the heel portion. It is to be pushed back from the stretchable fabric as a high reaction force. Therefore, if you sit for a long time, you will feel as if you are sitting on a slightly hard seat, and you will feel numbness due to pressure on the buttocks.

  The chair made of the stretchable mesh fabric described above has been able to achieve light weight, rid of stuffiness, and good sitting comfort for a short time. The current situation is that no satisfaction has been obtained for the comfort of the car.

  As a result of earnest research to solve the above-mentioned problems, the present invention is a chair that can obtain a chair that is comfortable to sit down for a long time as well as to be light, rid of stuffiness, and comfortable for a short time. A fabric for tension is provided.

  (1) The chair upholstery fabric according to the present invention is characterized in that at least one area of the fabric is more stretchable than other portions of the area.

That is, the chair upholstery fabric of (1) is, for example, a fabric having at least a basis weight of 200 g / m ² or more and 1200 g / m ² or less and a thickness of 0.3 mm or more and 3 mm or less, and at least one of the fabrics Because the area is more elastic than the other parts, for example, if the area where the convex part of the buttock is placed is a highly elastic area, the fabric will stretch along the convex part of the buttock, so There is little feeling, and portions other than the convex portion of the buttocks are relatively less stretchable, so that the entire body load can be stably and sufficiently supported. Therefore, it is possible to obtain a chair upholstery fabric that is lightweight, has a feeling of bottoming even when used for a long time, and is less likely to get tired.

  (2) Further, in the configuration of the above (1), the fabric may include an elastic yarn of 30% to 100% by weight percent.

That is, the chair upholstery fabric (2) is a fabric having a basis weight of at least 200 g / m ² or more and 1200 g / m ² or less and a thickness of 0.3 mm or more and 3 mm or less, and is at least one of the fabrics. The area is more stretchable than the other parts, and the fabric contains elastic yarn of 30% or more and 100% or less by weight percent. Including the configuration in which only the fabric structure is changed without thread and the fabric is partially stretched by other processing methods for the fabric, the configuration in (2) above is, for example, stretchable. If elastic yarn is used for the area to be enlarged, it becomes possible to increase the stretchability of the required area regardless of whether the fabric structure is changed or not. Small , It is possible to obtain a hard upholstery fabric fatigue in long-term use.

  (3) Furthermore, in the configuration of the above (1) or (2), the area of the area having a large stretchability in the fabric portion of the seat portion in the chair in which the fabric is stretched may be 5% to 50%. .

  That is, in the chair tension fabric of the above (3), the area of the seat surface portion excluding the backrest portion where the stretchability of the fabric portion is large is 5% to 50% in the chair stretched with the fabric. For example, the body load is stably supported at a location where the stretchability of the fabric is relatively small, and the fabric stretches along the convex portion of the buttocks at a location where the stretchability of the fabric is large. It is possible to obtain a fabric for upholstery that provides a feeling of comfort, is light and has a feeling of bottoming, and does not get tired even when used for a long time.

(4) Furthermore, in each configuration of the above (1) to (3), in the seat surface portion in the finished state of the chair, the fabric in the case where an area having high elasticity is provided in a load area caused by a person sitting An E / P value obtained by dividing the maximum pressure value E (g / cm ² ) in the load region by the maximum pressure value P (g / cm ² ) in the load region of the fabric when no area with high stretchability is provided. It is good also as a structure which is the range of 0.4-0.97.

In other words, the chair upholstery fabric of (4) above has a seat surface portion with a pressure distribution / surface pressure measurement sheet (XSENSOR of Ken Automation Co., Ltd.) on the seat surface portion excluding the backrest when finished into a chair. In the body pressure dispersion measurement method in which the same person sits on the cloth, the maximum pressure value E (g / cm ² ) of the fabric provided with the area having high elasticity is set to the area where the elasticity is high in the same knitted fabric. Since the E / P value divided by the maximum pressure value P (g / cm ² ) at the same seating surface location of the fabric where no fabric is provided is in the range of 0.4 to 0.97, it is light and has a long bottom feeling. A chair upholstery fabric that is less likely to get tired even with time use can be obtained.

  (5) Moreover, in each structure of said (1)-(4), the area which gives the elasticity by making the area which enlarges elasticity into the part outside the area which makes the elasticity of the fabric larger gives the resin. You may form by suppressing the stretchability of a fabric structure | tissue or an elastic yarn, and leaving the expansion-contraction of the area which enlarges a stretchability.

  (6) Furthermore, in each configuration of (1) to (4) above, a fabric in which a porous air permeable film is adhered by adhering a porous air permeable film having a hole in the shape of an area that increases stretchability to the fabric. The area where the stretchability is increased may be formed by suppressing the stretchability of the fabric structure or elastic yarn in the portion outside the area where the stretchability is increased and leaving the stretchability of the area where the stretchability is increased.

  (7) Furthermore, in each of the above configurations (1) to (4), the area that increases the stretchability is heated or partially melted by heating or partially melting a portion outside the area that increases the stretchability of the fabric. Alternatively, a stretchable area may be formed by suppressing stretchability of the partially melted fabric structure or elastic yarn, and leaving the stretch of the area that increases stretchability.

  That is, in the fabric for upholstery of the above (5) to (7), a method for obtaining an area having a large stretchability is a method in which resin is applied to a portion outside the area of the fabric by printing or a hole is formed in the area shape. A method by which the stretch of the fabric structure or elastic yarn of the portion outside the fabric area is suppressed by the method of bonding the opened porous ventilation film, and the stretch of the area portion remains, or the portion outside the fabric area is heated and set Alternatively, by partially melting, the stretch of the fabric structure or elastic yarn in the portion outside the fabric area is suppressed, and the expansion and contraction of the area portion is left, so that the stretchability of the fabric is not always changed. Production is easy because it is possible to obtain a highly stretchable area by post-processing without changing the fabric structure or partially inserting elastic yarns. Less bottoming feeling in an amount, it is possible to obtain a hard upholstery fabric fatigue in long-term use.

  (8) Further, in each of the above constitutions () to (4), the cloth contains elastic yarns, and at least one of the elastic yarns has a part of a melting point component of 200 ° C. or less in an area where elasticity is increased. The area having high elasticity may be formed by heating and melting or semi-melting only the portion outside the area where the elasticity is increased.

  That is, in the fabric for upholstery of the above (8), at least one of the fibers constituting the fabric is an elastic yarn having a melting point component of 200 ° C. or less in part, and only the outer portion is heated to melt to half Since it is characterized by melting, it is possible to obtain a fabric for chair upholstery that is lighter and less likely to have a bottom, and is less tiring even after long-term use.

  (9) Further, in each of the above configurations (2) to (8), the fabric may include an elastic yarn, and at least one of the elastic yarns of the fibers constituting the fabric may be a polyester elastomer.

  That is, the chair upholstery fabric of (9) is characterized in that the elastic yarn of the fibers constituting the fabric is a polyester elastomer Diaflora (registered trademark) manufactured by Toyobo Co., Ltd. Therefore, it becomes a fabric for upholstering that has little feeling of bottoming and is hard to get tired even after long-term use.

  (10) Furthermore, in each of the configurations (1) to (9), the fabric may be a knitted fabric.

  That is, since the fabric for chair upholstery of (10) is a knitted fabric, it is a fabric for upholstery that is lighter, less likely to have a bottom, and is less likely to get tired even after long-term use.

  The fabric for upholstery of the present invention can be used for a short time and for a long time in addition to making it lightweight and preventing it from becoming damp, which has been a problem of fabrics used in conventional chairs. It was possible to achieve that no numbness was felt in the buttocks.

(A) is a plan view showing the size of the fabric for the chair upholstery fabric in the present embodiment, and (b) is a view of the area portions F1 and F2 for increasing the stretchability of the seat surface portion in the fabric of (a). It is a top view which shows a shape, (c) is a top view which shows the state which inserted the metal pipe in the fabric of the said (a). It is a perspective view of the pipe chair which removed the seat surface part and the back surface part. It is the perspective view which fixed the fabric shown to (c) of FIG. 1 to the pipe chair shown in FIG. (A) is a schematic plan view of a pressure distribution / surface thickness measurement sheet, and (b) is a schematic side view showing a state in which the pressure distribution / surface thickness measurement sheet is installed on a seat surface and connected to a computer. It is a perspective view which shows the state which the test subject sat down. It is a body pressure dispersion | distribution image which shows the measurement result of a developed product and a comparative product. It is a body pressure dispersion | distribution graph which shows the measurement result of a developed product and a comparative product.

  Hereinafter, the present invention will be described in detail.

The fabric weight of the chair fabric used in the present invention is preferably 200 g / m ² or more and 1200 g / m ² or less. If it is less than 200 g / m ² , there is no durability for use by persons having a physique of junior and senior high school students or more. Moreover, it is because the fabric exceeding 1200 g / m ² cannot exhibit the increase in suffocation and the stretchable area characteristics due to a decrease in air permeability, which is not suitable for light weight. More preferably, the fabric for the chair has a basis weight of 300 g / m ² to 850 g / m ² .

  Moreover, as thickness of the fabric for chairs used for this invention, 0.3 mm or more and 3.0 mm or less are preferable. If it is less than 0.3 mm, it is not durable for use by those who have a physique of junior and senior high school students or more, and the part in contact with the chair frame hits something and other equipment (desk legs, etc.), causing holes and tears It becomes easy. Further, if it exceeds 3.0 mm, there are few holes and tears due to hitting, but it is not suitable for the light weight. In order to further improve the durability, sufficiently reduce the weight, to have good air permeability and to further exhibit the stretchable area characteristics, it is more preferably 0.7 mm to 2.0 mm.

  In addition, the elastic yarn contained in the chair fabric used in the present invention is not particularly limited, and elastic properties such as urethane fibers such as natural rubber and spandex, polyester-ether copolymer fibers, and polyolefin elastic yarns. Monofilament or multifilament may be used as long as the material possesses. The percentage by weight of elastic yarn in the fabric is preferably 30% or more and 100% or less. If it is less than 30%, the elastic recovery of the portion including the area of the present invention, which is pressurized by the buttocks when standing up from the chair used for a long time, is delayed, and the duration of the indented state is prolonged. More preferably, it is 40% to 70-80%. The reason is that when using the polyester elastomer Diaflora (registered trademark) produced by Toyobo Co., Ltd. as an elastic yarn, the elastic yarn has poor water absorption, and the amount of the elastic yarn used is 100% by weight. Body fluids such as sweat from the body will stay as they are, which may lead to discomfort such as stuffiness. Therefore, by mixing other fiber materials as 70 to 80% by weight, the above-mentioned body fluid will be absorbed and diffused by the other fiber materials, so that it is considered to be comfortable. The fiber material other than the elastic yarn in this case is not particularly limited, but polyester fiber is preferable from the viewpoint of the versatile fiber material.

  Moreover, the area of the area showing a large stretch characteristic value in the chair fabric used in the present invention is preferably 5% or more and 50% or less of the area of the seat surface of the chair. If it is less than 5%, the area is too small to receive the swollen portion of the buttocks when sitting, and the effect of the present invention is not obtained, and the boundary between the area part and the area outside the area becomes pressure on the buttocks. . Further, if it exceeds 50%, most of the user's buttocks enter the area and receive weight in the area, resulting in a feeling of bottoming. More preferably, it is 10% to 35% as a commodity having versatility with respect to those having a standard physique.

  Moreover, as a method of obtaining the area which shows the big elastic property value in the fabric for chairs used for this invention, it can be obtained if the elastic property of an area outside level is made smaller than the site | part in an area. As this method, for example, a screen print shaped so that the resin adheres only to the area outside the area, a method having a low elasticity, for example, applying and curing a urethane resin, or a porous film in which the area portion is hollowed out There are a method of bonding to a fabric, and a method of heating and setting only the outside of the area, but are not limited to the above. By these methods, the area remains as a fabric having a degree of freedom, and thus becomes an area showing a low stress value at the time of compression. The resin, film material and heating conditions used at this time are not particularly limited, but the resin or film is preferably a resin having some elasticity. If the stretchability is lost at all, it is not preferable because it feels hard outside the area, and it is preferable to have some stretchability outside the area.

  Another method for obtaining an area showing a large stretch characteristic value in the fabric for chairs used in the present invention is to heat and set the fabric containing elastic yarn only outside the area under light or no tension. There is a method to suppress elasticity. As a result, the portion in the area is not heated, and thus the fabric remains as a fabric having a degree of freedom of expansion and contraction, so that an area having a large expansion and contraction characteristic value is obtained. As this method, the fabric may be heated and pressed with two heated press plates from which the shape of the area has been cut off. In this case, there is an advantage that production is easy and mass production is possible, and cost can be reduced.

  Further, as another method for obtaining an area showing a large stretch characteristic value in the chair fabric used in the present invention, it is preferable that at least one of the fibers constituting the fabric has a low melting point component of 200 ° C. or lower. . The low melting point portion outside the area is heated to melt a part thereof to suppress stretchability. When the temperature exceeds 200 ° C., the thermal shrinkage of the outer fabric of the area increases, and the possibility of occurrence of wrinkles (puckering) with a dove inside the area inside and outside the area increases. Preferably, the temperature is 180 ° C. or lower, and in this case, there is an advantage that there is no possibility that wrinkles with wrinkles (puckering) occur inside the area inside and outside the area.

  Further, as another method for obtaining an area showing a large stretch characteristic value in the chair fabric used in the present invention, it is desirable that the melting point of the elastic yarn is lower than the melting point of other fibers constituting the fabric. The structure of this elastic yarn is not particularly limited, and the elastic yarn as a whole may be a fiber having a low melting point, and the low melting point portion may be a sheath having a core-sheath structure. However, the melting point is 200 ° C. or lower, preferably 185 ° C. or lower.

  The fabric of the chair fabric used in the present invention is preferably a knitted fabric rather than a woven fabric. As one of the reasons, when a load is applied to the woven fabric, only the warp and weft of that portion receive the load, and the directions are only the vertical and horizontal directions, and the diagonal directions are not easily applied. This increases the feeling of bottoming when sitting. In that respect, the knitted fabric is less likely to wrinkle at the area boundary due to the shrinkage difference due to the above-described processing, etc., and exhibits multi-direction load dispersibility and stretchability unique to the knitted fabric. More preferably, a weft knitting is appropriate. That is, in the warp knitting, the movement of the yarn is restricted at the knot portion and the stretchability of the entire fabric is lost, so the weft knitting is preferable in order to maintain the stretchability. In addition, the weft knitting can be manufactured in a small lot compared to the warp knitting, and preparation for manufacturing is simple.

  Next, the present invention will be specifically described using examples and comparative examples, but the present invention is not limited to these examples.

Using a 30-inch 18-gauge single circular knitting machine, we knit 500 dtex black monofilament (Diaflora: manufactured by Toyobo Co., Ltd.) as the elastic yarn and polyester 660 dtex-192 filament heated yarn as the other yarn This was knitted with a raw machine density of 19 courses / inch, 20 wales / inch, a raw machine weight of 540 g / m ² , a thickness of 1.35 mm, and a width of 104 cm (208 cm when opened).

  Next, the part corresponding to the area part is 15 cm long axis × 10 cm short axis long so that the density of the area other than the area part is 19 course / inch and the width is 23 wales / inch under light tension to suppress shrinkage by opening the living machine. Hold the elliptical hole of the hole in a pair of elliptical holes 2cm apart in the direction of the minor axis and sandwich it for 50 seconds under the condition of 180 ° C ± 1 ° C with temperature control by electric heating, A part of the black monofilament was melted and welded. The thickness of this part was 1.1 mm. On the other hand, the area portion was not heated, so it was almost in the live state.

  Next, this fabric is cut as shown in FIGS. That is, FIG. 1 shows a fabric for a chair upholstery according to the present embodiment. As shown in FIG. 1A, a seam allowance A having a width of 6 cm is formed in four sides of a rectangle that becomes a seat surface portion E having a width of 41 cm and a length of 46.5 cm. , B, C and D were formed. In addition, F1, F2 in a figure shows the shape of the area part which enlarges the elasticity of the seat surface part E. As shown in FIG. Then, as shown in FIG. 1 (c) using the seam allowance, the 6 cm wide seams A, B, C, and D4 sides are folded and sewn to a 3 cm width to form a cylinder, and the length is about 60 cm and 15 mm. A diameter metal pipe L was inserted.

  This is shown in FIG. 2 (c) as shown in FIG. 3 in the framework of the existing pipe chair H from which the seat surface portion and the back surface portion shown in FIG. 2 are removed (the space between the left and right pipes of the seat surface portion is 41 cm). Fix the fabric. That is, four 15 mm-diameter metal pipes L inserted into the fabric cylinder obtained by sewing are positioned outside the leg pipe M of the chair and stretched while being pulled, and the leg pipes are not returned. M and the metal pipe L which protruded from the cylinder part were fixed. The fabric E serving as the seat portion in the fixed state is 18 courses / inch in length and 24 wales / inch in width, and the area portions F1 and F2 have an elliptical shape with a major axis of 14 cm and a minor axis of 11 cm.

  Next, the pressure distribution / surface pressure measurement sheet O ((surface pressure measurement sheet XSENSOR of Ken Automation Co., Ltd.) shown in FIG. 4A is applied to the stretched seat surface fabric surface E in FIG. 4B. As shown in the figure, it was installed on the seating surface portion and connected to the computer K so that surface pressure data could be taken in. The pressure distribution / surface thickness measurement sheet O shown in FIG. Each cell represents a measurement point, and the cell is divided into 36 points of 1 to 36. The symbol N in the figure indicates the floor surface, and the symbol P uses a 15 mm diameter metal pipe. In this state, the examiner J is seated so that the center of the buttocks is positioned in the area portions F1 and F2, as shown in FIG. We obtained the data shown in Fig. 6 and Fig. 7. In Table 1, Fig. 6 and Fig. 7, 6 shows a body pressure dispersion image showing the measurement results of the development product and the comparison product, and FIG. 7 shows the body showing the measurement results of the development product and the comparison product. It is a pressure dispersion | distribution graph, Comprising: The value which averaged the measured value of the vertical direction between the horizontal direction 2 lines of FIG.6 is represented on a vertical axis | shaft, and a horizontal axis represents the 36 measurement points of A-AK. These are values obtained by averaging the measured values in the vertical direction between the two horizontal lines in FIG. 6 for each cell.

[Comparative example]
Opened using the same raw machine as in the example, and sandwiched between two metal plates with no area part under tension to suppress shrinkage (temperature can be adjusted by electric heating) at 180 ° C ± 1 ° C for 50 seconds, black A part of the monofilament was melted and welded. Further, a part of the black monofilament was melted and welded so that the density was 19 course / inch and the width was 23 wal / inch. Thereafter, as in the examples, sewing, pipe insertion, fixing to a pipe chair, seat pressure measurement sheet, seating the examiner, collecting data in that order, and obtaining the data shown in Table 1, FIG. 6 and FIG. It was. In Table 1, FIG. 6 and FIG. 7, the comparative example is indicated as a comparative product. 6 shows a body pressure dispersion image showing the measurement results of the developed product and the comparative product, and FIG. 7 is a body pressure dispersion graph showing the measurement results of the developed product and the comparative product, which is the horizontal direction of FIG. A value obtained by averaging the measurement values in the vertical direction between the two lines is represented on the vertical axis, and the horizontal axis represents 36 measurement points A to AK. Table 1 shows a value obtained by averaging the measured values in the vertical direction between the two horizontal lines in FIG. 6 for each cell.

As a result of the above, remarkable results were obtained in the portions corresponding to the protruding portions of the L-O and Y-AC buttocks of the cell ID. That is, in the range of L~O of cell ID, comparative greater pressure concentration is between ^{162g / m 2 ~104g / m 2} , the developed product in this range, the pressure concentration 136g ^{/ m 2} ~59g ^/ m 2 and ^decreases, 26g / ^m 2 ^~89g / m difference ² exits results came out. In addition, in the range of Y to AC in the cell ID, the comparative product has a large pressure concentration of 131 g / m ^{2 to} 80 g / m ^2, and the developed product in that range has a pressure concentration of 102 g / m ^{2 to} 42 g / m ^2. and ^decreases, 29g / ^m 2 ^~55g / m difference ² exits results came out. As a result, the pressure concentration in the vicinity of the protrusion of the buttocks is greatly relieved, and even when sitting for a long time, the pressure on the protrusion of the buttocks is small, so there is little occurrence of fatigue and numbness, so a comfortable sitting comfort is obtained. Turned out to be.

Industrial application fields

  The present invention relates to a fabric for a chair that is lightweight, does not stuffy, and is less likely to get tired after prolonged use.

A, B, C, D: seam allowance for forming a 15 mm diameter metal pipe insertion tube E: seat surface portion F1, F2 ... area portion H: pipe seat with the seat surface portion and back surface portion removed Pipe structure J ... Seated subject K ... Computer L ... 15mm diameter metal pipe M used to stretch the sample ... Pipe chair leg N ... Floor surface O ... Body pressure dispersion measuring sensor P ... Fabric with four sides stretched using a 15mm diameter metal pipe loosened by sitting

Claims (10)

A fabric for upholstery characterized in that at least one area of the fabric is more stretchable than other portions of the area. The fabric for upholstery according to claim 1, wherein the fabric contains elastic yarn in a weight percentage of 30% or more and 100% or less. The fabric for chair tension according to claim 1 or 2, wherein the area of the stretchable area in the fabric portion of the seat portion in the chair on which the fabric is stretched is 5% to 50%. In the seat part finished in the chair,
The maximum pressure value E (g / cm ² ) in the load region when a large stretch area is provided in the load region due to the seating of the person, the fabric of the fabric when the large stretch area is not provided 4. The E / P value divided by the maximum pressure value P (g / cm ² ) in the load region is in the range of 0.4 to 0.97. 5. Chair upholstery fabric. Area that increases elasticity by suppressing the elasticity of the fabric structure or elastic yarn of the part to which the resin is applied by applying resin to the area outside the area that increases the elasticity of the fabric. The fabric for upholstery according to any one of claims 1 to 4, which is formed by leaving the expansion and contraction of. The area outside the area where the stretchability of the fabric to which the porous breathable film is bonded is increased by adhering the porous breathable film having a hole in the shape of the area where the stretchability is increased, to the fabric. The fabric for chair upholstery according to any one of claims 1 to 4, wherein the fabric is formed by suppressing expansion and contraction of a fabric structure or elastic yarn and leaving an expansion and contraction of an area that increases the stretchability. The area where the stretchability is increased is heated or partially melted outside the area where the stretchability of the fabric is increased, thereby suppressing the stretchability of the fabric structure or elastic yarn of the heated set or partially melted portion. The stretchable fabric according to any one of claims 1 to 4, wherein the stretchable area is formed by leaving the stretch of the area that increases the property. The fabric includes an elastic yarn and has an area where the stretchability is increased. At least one of the elastic yarns has a melting point component of 200 ° C. or less in part and heats only the portion outside the area where the stretchability is increased. The stretchable fabric according to any one of claims 1 to 4, wherein an area having high stretchability is formed by melting or semi-melting.   The fabric for chair upholstery according to any one of claims 1 to 8, wherein the fabric includes an elastic yarn, and at least one of the elastic yarns of the fibers constituting the fabric is a polyester elastomer.   The fabric for upholstery according to any one of claims 1 to 9, wherein the fabric is a knitted fabric.